Sanitary pump



Sept. 13, 1949. I w. E. BAKEWEYLL 2,481,560

SANITARY PUMP Filed May 51, 1947 4 Sh eets-Shet i Sept. 13, 1949. w B L2,481,566 I SANITARY PUMP Filed May 31, 1947 Y 4 snets-sneet 2 W I MarneSept. 13, 1949. w. E. BAKEWEL,L 2,431,550

' SANITARY PUMP Filed May 31, 1947 4 Sheets-$heet 3 c/gy W/ofJ E.BAKEWELL 2,481,560

SANITARY PUMP Filed May 31, 1947 v 4 Shets- Sheet 4 Maw Mg? wi /ZPatented Sept. 13, 1949 UNITED STATES PATENT OFFICE SANITARY PUMPApplication May 31, 1947, Serial No. 751,555

8 Claims.

This invention relates to a pump for use with a liquid, such as milk,wherein the pump must be kept clean and sanitary and more particularlyto apump that is separable without being dis-assembled, for cleaning andsanitary purposes.

In the use of so-called sanitary pumps in the art, to pump milk andother liquids that sour, all States have rigid health requirementssurrounding the sanitary conditions of the pump. In most States, gasketsare not allowed for sealing purposes, hence all sealing surfaces must bemetal to metal. No corners or places to catch and hold liquid areallowed. The pump. must be disassembled or separable and every part ofthe pump reached for cleaning purposes. If the pump is entirelydisassembled, there is great danger when the separate parts are washedin a bucket of the finely ground surfaces of the sealing parts becoming,injured from bumping and hitting other parts and of the pump leakingwhen. it is re-assembled. It is with manufacturing a pump that the metalto metal sealing surfaces will receive the maximum protection incleaning that the present invention is concerned- It is an object of theinvention. among others, to provide a pump that can be washed and madesanitary by separating the different parts of the pump and washing butnot having to dis-assemble the pump; a pump whose separate parts thereofcan be separated on a supporting structure corrnected with the pump andsufficient space provided to wash each separate part; a pump of longerlife because the parts do not suffer injury in Washing; a pump whereinwashing ofthe pump parts and reassembly of theparts can be accomplishedin a minimum length of time; a pump having replaceable inlets andoutlets; a pump simple of construction and operation and economicalbothin construction and operation; and a pump requiring no special skill onthe part of an operator to separate and wash the parts making up thepump and to re-assemble after washmg.

In carrying out the objects of the invention there is provided a pumpstructure including a pump t-zasin-g withv a head portion. at. one endof the pump casing sealing with the pump casing and a support bracketclosing the other end of the pump casing. Bolts pass from the headportion to the support bracket,, on the outside of the pump casing, tokeep the pump casing, head portion and support bracket assembled. Thebolts may be anchored in the head portion and have a portion of thebolts screw threaded to receive nuts to draw the pump casing. headportion and support bracket into assembled position. The pump casingcontains internal-external gears and a shaft extends through the supportbracket and connects to the external gear. The head portion has areplaceable inlet therein leading into a pump chamber and also areplacement outlet from the pump chamber. The bolts extend beyond thesupport bracket for a substantial distance and the head portion andbolts are extensible with respect to the support bracket when the nutson the bolts abutting the support bracket are loosened to allow thebolts to slip through the supporting bracket to space the head portionfrom the supporting bracket and pump casing a sufficient distance toallow cleaning of the head portion without removal from the bolts. Thebolts also form a cage in which the pump casing can be moved from thesupport bracket to the head portion. The bolts pass through sleeveportions attached to the support bracket with the bolts movable withinthe sleeves. The bolts, in extended position, form a support and spacingmeans for the different parts of the pump for cleanin purposes. The pumpcasing, internal-external gears and support bracket are separable fromeach other and movable on the bolts. The pump parts, after cleaning, arereassembled on the bolts into a working unit.

With the foregoing and other objects in view, the invention will be morefully described herewith and will be particularly pointed out in theclaims appended hereto.

In the drawings, wherein like symbols refer to like or correspondingparts throughout the several views;

Figure I is a side elevational view of the assembled pump structure withthe connection of the outlet in the head portion broken away.

Figure 2 is a sectional view taken on the line 2 -2 of Figure 1.

Figure 3 is a side elevational view with part thereof in section showingthe head portion and internal gear separated and spaced on the boltsfrom the pump casing and support bracket.

Figure 4 is a side el'evational view showin the head portion separatedand spaced on the bolts from the pump casing and support bracket and theinternal gear removed from the head portion.

Figure 5' is a side elevational View showing the head portion separatedand spaced on the bolts from the support bracket and the pump casingmoved within the bolts to contact the head portion thus exposing theexternal gear.

Figure 6 is a side elevational view showing the head portion separatedand spaced on the bolts from the support bracket with the pump casingmoved within the bolts to abut the head portion and the external gearmoved to the right within the pump casing exposing the equalizer ring.

Figure 7 is a side elevational view with the head portion, pump casinand external gear in the position of Figure 6 and with the equalizerring and wear rings moved to the head portion leaving the supportbracket alone on the left.

The pure structure is shown in Figure 1 as having a pump casing I, ahead portion 2 and a support bracket 3. The parts I, 2 and 3 areseparable from each other and are held in assembled position by bolts 4.

The pump casing I is cylindrical and the pump parts are within the pumpcasing I'when the pump is in assembled position. The pump casing I maybe cut from a pipe of considerable length and of a metal that will meetthe health requirements set by the different states and need not beaspecial casing. The pump structure is the internal-external gear typepump, made and sold now by the Viking Pump Company of Cedar Falls, Iowa.The interal gear 5 is an idler gear and rotates .on idler shaft 6. Theidler shaft 6 is a part of the head portion 2 and a crescent 'I is alsoa part otthe head portion 2 and extends therefrom. The external gear 8has a shaft 9 connected thereto which connects to-a power source (notshown) to rotate the external gear 8.

The head portion 2 has an inlet coupling I and an outlet coupling'IImounted in the head port on 2 by welding I2. If the threads on thecoupling members I I] and II become worn, the coupling members I i] andII can be removed from the head' portion 2 and new coupling membersinserted by welding. The pump'casing I fits over the head portion 2 andseals with the head portion 2 when bolts dare tightened. An equalizerring I3 is placed between the support bracket 3 and the end of the pumpcasing I to act as a seal a pump chamber I4 is formed into which inletIii leads and the outlet I I leads from the chamber I 5.

The support bracket 3 is carried on a supporting pedestal I5 which inturn serves as a supporting structure for the whole pump structure. Thesupport bracket 3 has a projecting sleeve I5 with a bearing I1 withinthe sleeve 5 for the shaft 9 which rotates the external gear 8. Alsowithin the support bracket 3'are wear rings I8 and I9 to space andsupport the shaft 9 within the support bracket 3.

The function and operation of the equalizer ring I3 is fully set forthand claimed in applicants copending application Serial Number 738,183filed March 29, 1947 and is the-same in the present instance as in thatapplication.

The bolts 4 extend beyond the support bracket 3 when the parts of thepump are attached in operative relationship. The bolts 4 have .one endthereof attached or embedded in the headportion 3 while the mid-portionof each bolt is screw threaded as at 20 and wing nuts 2I screw on thesealing engagement with the head portion 2 and the support bracket 3.

In'the assembled position of Figures 1 and 2, the inlet I0 is connectedto a source of'milk supply that it is desired to move and the outlet II,from the pump delivers the milk under pressure from the pump to a'distribution conduit (not motor (not shown) which in turn rotates the.screw threads 20 to pull the pump casing I into shown) The shaft 9 isrotated, as by an electric When the pump is stopped, or when a timeinterval has expired that is determined by law necessary to clean thepump, cleaning operations are started. Turning now to Figure 3-, thewing nuts 2| are loosened and slipped to the rear of each bolt 4 untilthe wing nuts 2| contact the heads 22 of each bolt 4. A sleeve 23surrounds the bolts 4 between the head portion 2 and the support bracket3 when the pump is in the assembled position of Figure '1. The sleeves23 pass through the support bracket 3 and the bolts 4 are slidablethrough the sleeves 23. The bolts 4 slide through sleeves 23 until wingnuts '2I contacting bolt heads 22 contact the end of sleeves 23 at whichpoint, the head portion 2 will be spaced from the support bracket 3 asshown in Figure 3. It will be noted that in this position the screwthreads 20 are within the sleeve 23 and fully. protected from damage. I

With the parts in the position of Figure 3 itis seen that the internalgear Bis carried by the head portion 2. -The internal gear 5 is thebeginning of the cleaning operation. The operator may have a hose nozzleattachedto water under pressure, a bucket of water with a cleaning fluidor soap and brushes and implements for cleaning. The gear 5 may beremoved by movinggear 5 to the left on idler shaft 6 and removing thegear 5 from the assembly through the bolts 4. The gear 5 may then bewashed in the bucket with abrush and rinsed in a suitable manner. Withthe gear 'o'removed, the head portion 2 with idler shaft 5, crescent I;and outlet II and inlet I0 can be washed while supported, on bolts 4. ,Acleaner can get in aroundthe differentparts witha brush and then rinsewith Water from the hose nozzle.

Figure 5 shows the pump casing I moved to the right and into contact,with the head por-' tion 2. The bolts 4 and sleeves 23 form a cage forthe pump casing I which also allows the pump casing to move horizontallywithin the cage. With the pump casing in the position shownin Figure 5,an operator can get into the interior of pump casing -I to thoroughlyclean the pump casing I., After pump casing I has been moved to theright, the external gear 8 is exposed at the left of Figure 5 and can beseparated from equalizer ring I3 and cleaned after 7 which the externalgear 8 is moved to the right within the pump casing I as clearly shownin Figure 6. I The equalizer ring I3 can then be moved to the rightslightly and cleaned before being moved to the right to contact externalgear Ii. The wear rings I8 and I9 can then be separated and cleaned andmoved to the right as shown in Figure 7-. The interior of supportbracket 315 now accessible for cleaning purposes. 7

It can readily be seen that the pump structure can be separated forcleaning purposeswith sufficient space to allow a clean-er to reach allparts vof the pump and without taking the pump apart ting the partsmixed in assembly. The polished sealing surfaces of the respective partsare not placed in a washing vessel. where they will bump and abrade eachotherby movement in the water hence while the present structure givesmore life to the pump it further does notrequire an experienced operatorto-wasl-r the pump;

It wil! be understood that the invention has been described for purposes"of illustr-ation and explanation and that changes and variations arepossible without. departing. from the scope of the invention; all suchmodifications and changes are intended. to. be included: in the appendedclaims.

I claim:

A ump s ructure comprising. a p p ca ing, a head portion at one end ofthe pump casing sealing with the pump casing, a support bracket closingand. sealingwith the other end of the pump casing, bolts anchored inthehead portion and passing. through the support bracket and extendingbeyond thesupport; bracketv a substantial distance and nuts. on the.bolts drawing the purine casing. head portion: and? support bracket intoassembled position.

2. A pump structure readily assembled and separable for cleaningpurposes comprising a pump casing, a head portion at one end of the pumpcasing sealing with the pump casing, a supporting bracket closing andsealing with the other end of the pump casing, bolts attached tothe'head portion and passing through the supporting bracket, said boltsextending beyond the support bracket for a substantial distance,tightening means on the bolts which abut the support bracket to keep thepump casing, head portion and support bracket in assembled relation andsaid head portion and bolts being extensible with respect to thesupporting bracket when the tightening means is loosened to allow thebolts to slip through the supporting bracket to space the head portionfrom the supporting bracket and pump casing a sufficient distance toallow cleaning of the head portion without removal from the bolts.

3. A pump structure readily assembled and separable for cleaningpurposes comprising a pump casing, a head portion at one end of the pumpcasing sealing with the pump casing, a supporting bracket closing andsealing with the other end of the pump casing, bolts attached to thehead portion and passing through the supporting bracket, said boltsextending beyond the support bracket for a substantial distance,tightening means on the bolts which abut the support bracket to keep thepump casing, head portion and support bracket in assembled relation andsaid bolts forming a cage in which the pump casing can be moved from thesupport bracket to the head portion.

4. A pump structure comprising a pump casing, rotating internal-externalgears within the pump casing, a head portion at one end of the pumpcasing sealing with the pump casing, a support bracket through which ashaft extends connecting to the external gear, said support bracketclosing and sealing with the other end of the pump casing, headed boltsanchored in the head portion and passing through the support bracket; onthe outside of the pump casing, said bolts extending beyond the supportbracket for a substantial distance, nuts on the bolts fastened to screwthreads on the bolts with the nuts abutting the support bracket to drawthe pump casing, head portion and support bracket into assembledposition and said bolts forming a cage in which the pump casing can bemoved from the support bracket to the head portion.

5. A pump structure readily assembled and separable for cleaningpurposes comprising a pump casing, a head portion at one end of the pumpcasing sealing with the pump: casing. a supporting bracketclosing andsealing with. the other end of the pump casing, bolts attached to thehead portion and; passing. through the.- sleeve portions attached to thesupporting bracket, said belts extending beyond the support: bracket fora substantial distance, tighteningmeans on the bolts: which abut thesupport bracket to: keep the pump casing, head portion and supportbracket in assembled relation, said head: portion and bolts beingextensible in the sleeves: with respect to thesupportin bracket when thetightening means is loosened to allow the bolts to slip through thesleeves tospace the head portion from the sup.- porting bracketand pumpcasing a sufficient dista nce toallow cleaning or thehead portionv andsaid bolts and sleeves forming a cage in which the pump casing can bemoved from the support bracket to the head portion.

6. A pump structure readily assembled and separable for cleaningpurposes comprising a pump casing, rotating internal-external gearswithin the pump casing, a head portion at one end of the pump casingsealing with the pump casing, a support bracket through which a shaftextends connecting to the external gear, said support bracket closingand sealing with the other end of the pump casing, headed bolts anchoredin the head portion and passing through sleeve portions attached to thesupporting bracket and passing through and beyond the supporting bracketfor a substantial distance, nuts on the bolts fastened to screw threadson the bolts with the nuts abutting the support bracket to draw the pumpcasing, head portion and support bracket into assembled position, saidhead portion and bolts being extensible in the sleeves with respect tothe supporting bracket when the nuts are unscrewed to allow the bolts toslip through the sleeves to space the head portion from the supportingbracket and pump casing a sufflcient distance to allow cleaning of thehead portion and said bolts and sleeves forming a cage in which the pumpcasing can be moved from the support bracket to the head portion.

7. A pump structure readily assembled and separable for cleaningpurposes comprising a pump casing, a head portion at one end of the pumpcasing sealing with the pump casing, a support bracket closing andsealing with the other end of the pump casing, bolts attached to thehead portion and passing through the supporting bracket, said boltsextending beyond the support bracket for a substantial distance,tightening means on the bolts which abut the support bracket to keep thepump casing, head portion and support bracket in assembled relation,said head portion and bolts being extensible with respect to thesupporting bracket when the tightening means is loosened to allow thebolts to slip through the supporting bracket to space the head portionfrom the supporting bracket and pump casing a suflicient distance toallow cleaning of the head portion, said bolts forming a support andspacing means for the difierent parts of the pump for cleaning purposes,said pump casing and support bracket being separable and movable on thebolts and said pump after cleaning being reassembled on the bolts into aworking unit.

8. A pump structure readily assembled and separable for cleaningpurposes comprising a pump casing, rotating internal-external gearswithin the pump casing, a head portion at one end of pump casing sealingwith the pump casing, a support bracket through which a shaft extendconnebting=to the external gear, said support bracket c1osing andsealing with the other en d of the pump casing, bolts attachedto thehead portion and passing through the support bracket, said boltsextending beyond the support bracket fora substantial distance;tightening means on the bolts which abutthe support bracket to keep thepump casing, head portion and support bracket in assembled'relation;said head, portion and bolts being extensible with-respect to thesupport bracketzwhenthetightening means isloosened to allow the bolts toslip through the support bracket to space the head portion from thesupport bracketrand pump casing a sufficient distance to allow cleaningof the head portion, said bolts forming a. support and spacing means forthe different parts of the pump, for

cleaning purposes;-said pump casing, internalexternal gears and supportbracket being separable and movable on-the boltspandsaidpump, aftercleaningtbeing re-assembled on' the. bolts into a working unit. I

1 E. BA WEIQLQ 7 REFERENCES CITED The -following references are ofrecord inthe file of this patent: 1 r

